9
No sound
Defective Reset IC of IC603
1) Check volume and speaker
- Speaker
Defective MSP3400D of IC601
- Sound comes out only when being inputted into Audio
- Earphone Defective B+(8V,5V) of IC604,605. L/R
2) Check after replacing IC603
3) Replace IC601
4) Check and replace B+ of IC604,605.
10
Video color beat noise
Earphone shield case being touched
Check the mould of shield and JA401, Replace shield case
Soldering IC301 and IC507
Re-soldering
1
Soft touch doesn’t
Defective speaker wire
1) Make some space between the speaker wire and
function properly
and inverter wire
the Soft touch Board by sticking the speaker wire
to the guide hole of the cabinet.
2) Arrange working state of A1. Tape in the inverter wire
and correct working state of the Shield case.
2
Soft touch doesn’t
1) Broken components and
1) Check Soft touch with eyes
function
soldering of them
Check and repair soldering
2) P101 connector error
2) Check and repair the P101 connector
3
No screen
Input error of inverter connector
1) Bend the pin legs of P801 connector -> recheck them
2) Check and repair the IC801,802 SI4925
P502 and Pin 21 connector
1) Check and fix P502 connector
being slipped out
2) Check and fix the components at P502 LCD module
and at main board.
3) Check Pin21.
Cracked components and
1) Check and repair tuner board and main board
soldering at tuner board
2) Solder Q403, Q402 and C153
4
Dark screen
1) Defective LCD lamp
1) Replace the inverter
2) Defective inverter
2) Replace the LCD lamp
3) Input error of inverter connector
2) Check the connector input.
5
Broken OSD display
Defective the font rom of IC501
Check and replace the font rom of IC501
TROUBLESHOOTING
1. General Features
2. PC Mode
No.
Symptom
Cause
Check Point
No.
Symptom
Cause
Check Point
Check Point
6
Screen noise
Clock or phase being
1) Resettig is needed according to the video card of each
not able to be adjusted
PC
2) Horizontal noise : adjust phase until no horizontal
noise occurres
3) Vertical noise : adjust clock in menu until no vertical
noise occurres
7
Screen position error
Screen position error
1) Play the Auto Configure in Menu.
horizontally or vertically
2) Adjust horizontal and vertical position until the screen
displayes normally
8
Color beat noise
Soldering AD converter
Recheck adn repair AD9884
or making it short
3. TV and external input
No.
Symptom
Cause
